Maze Runner The Scorch Trials 2015

A mother drops off her son, Thomas, with scientist Ava Paige and troops of an organization called WCKD. Thomas and other abandoned children are placed in a walled maze in a glade as part of its scientific testing.

Years later, shortly after being rescued from the Maze, Thomas and the remaining Gladers – Teresa, Newt, Minho, Frypan, and Winston – are taken to a facility run by Mr. Janson. He says the facility is a safe haven, protecting them from WCKD, the Flare virus and the "Cranks", and provides them supplies. Thomas becomes suspicious and investigates. With help from Aris, the first maze survivor to arrive in the facility, Thomas discovers that WCKD's leader, Ava, is still alive and that Mr. Janson is working for WCKD, when they discuss experiments on the Immunes and that Janson has yet to find the Right Arm, a resistance group located in the mountains.